Jul 12 12:59:50.719 INFO checking bson-0.10.0 against try#d39a6f7eddafd45dcc60e99001b8cd08c2bd3255 for pr-52234
Jul 12 12:59:50.719 INFO running: cargo +d39a6f7eddafd45dcc60e99001b8cd08c2bd3255-alt check --frozen --all --all-targets
Jul 12 12:59:50.719 INFO creating container for: cargo +d39a6f7eddafd45dcc60e99001b8cd08c2bd3255-alt check --frozen --all --all-targets
Jul 12 12:59:50.719 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-0/pr-52234/try#d39a6f7eddafd45dcc60e99001b8cd08c2bd3255:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-52234/worker-0/try#d39a6f7eddafd45dcc60e99001b8cd08c2bd3255:/target:rw,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=500" "-e" "CMD=cargo +d39a6f7eddafd45dcc60e99001b8cd08c2bd3255-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "crater"`
Jul 12 12:59:50.911 INFO blam! aff18c4f7c767f464d252284433c1e4199894a738eab82eb2171546589d1333a
Jul 12 12:59:50.913 INFO running `"docker" "start" "-a" "aff18c4f7c767f464d252284433c1e4199894a738eab82eb2171546589d1333a"`
Jul 12 12:59:52.320 INFO kablam!     Checking bson v0.10.0 (file:///source)
Jul 12 13:00:02.302 INFO kablam! warning: unused variable: `tmp`
Jul 12 13:00:02.302 INFO kablam!  --> examples/test.rs:7:9
Jul 12 13:00:02.302 INFO kablam!   |
Jul 12 13:00:02.302 INFO kablam! 7 |     let tmp = bson::to_bson(&map).unwrap(); 
Jul 12 13:00:02.303 INFO kablam!   |         ^^^ help: consider using `_tmp` instead
Jul 12 13:00:02.303 INFO kablam!   |
Jul 12 13:00:02.303 INFO kablam!   = note: #[warn(unused_variables)] on by default
Jul 12 13:00:02.303 INFO kablam! 
Jul 12 13:00:03.905 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 11.81s
Jul 12 13:00:03.977 INFO kablam! su: No module specific data is present
Jul 12 13:00:04.516 INFO running `"docker" "rm" "-f" "aff18c4f7c767f464d252284433c1e4199894a738eab82eb2171546589d1333a"`
Jul 12 13:00:04.685 INFO blam! aff18c4f7c767f464d252284433c1e4199894a738eab82eb2171546589d1333a